libgo/go/os/path_windows_test.go

   1 // Copyright 2016 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package os_test
   6
   7 import (
   8         "os"
   9         "strings"
  10         "testing"
  11 )
  12
  13 func TestFixLongPath(t *testing.T) {
  14         // 248 is long enough to trigger the longer-than-248 checks in
  15         // fixLongPath, but short enough not to make a path component
  16         // longer than 255, which is illegal on Windows. (which
  17         // doesn't really matter anyway, since this is purely a string
  18         // function we're testing, and it's not actually being used to
  19         // do a system call)
  20         veryLong := "l" + strings.Repeat("o", 248) + "ng"
  21         for _, test := range []struct{ in, want string }{
  22                 // Short; unchanged:
  23                 {`C:\short.txt`, `C:\short.txt`},
  24                 {`C:\`, `C:\`},
  25                 {`C:`, `C:`},
  26                 // The "long" substring is replaced by a looooooong
  27                 // string which triggers the rewriting. Except in the
  28                 // cases below where it doesn't.
  29                 {`C:\long\foo.txt`, `\\?\C:\long\foo.txt`},
  30                 {`C:/long/foo.txt`, `\\?\C:\long\foo.txt`},
  31                 {`C:\long\foo\\bar\.\baz\\`, `\\?\C:\long\foo\bar\baz`},
  32                 {`\\unc\path`, `\\unc\path`},
  33                 {`long.txt`, `long.txt`},
  34                 {`C:long.txt`, `C:long.txt`},
  35                 {`c:\long\..\bar\baz`, `c:\long\..\bar\baz`},
  36                 {`\\?\c:\long\foo.txt`, `\\?\c:\long\foo.txt`},
  37                 {`\\?\c:\long/foo.txt`, `\\?\c:\long/foo.txt`},
  38         } {
  39                 in := strings.Replace(test.in, "long", veryLong, -1)
  40                 want := strings.Replace(test.want, "long", veryLong, -1)
  41                 if got := os.FixLongPath(in); got != want {
  42                         got = strings.Replace(got, veryLong, "long", -1)
  43                         t.Errorf("fixLongPath(%q) = %q; want %q", test.in, got, test.want)
  44                 }
  45         }
  46 }